While using the Crop tool, you can select from the list of default/preset aspect ratios, or choose Enter Custom from the list and create your own. Lightroom will save the last 5 custom aspect ratios entered.
In addition:
• “X” flips the crop (horizontal to vertical).
• “A” will lock or unlock the aspect ratio.

I crop in LR3 to 5×7. When I import it into PS5 it is 8×12. What am I doing wrong?
Mike R